This dataset is a thesaurus (MilkOligoThesaurus) gathering milk oligosaccharide names. This dataset is a table of names of unique milk oligosaccharide (rows) and descriptors (columns) including the name of the molecule, abbreviation, chemical database ID if available, chemical information (monoisotopic mass, osidic composition, molecular formula), synonyms, isomer groups, and scientific articles sources. The archive also includes two RDF serializations (in RDF/XML and TTL) of the dataset based on the W3C SKOS standard. The intermediate tabular file that allowed to produce these serializations with SkosPlay!, a free online convertion tool is included. A datapaper has been published in Data In Brief to detail how data were collected, described and transformed (https://doi.org/10.1016/j.dib.2024.110404) . English